function Block() {
    this.upDivWrap = null
    this.downDivWrap = null  //上方管道

    //用来生成div容器
    this.createDiv = function(url, height, positionType, left, top) {
        var newDiv = document.createElement('div')
        newDiv.style.width = '62px'
        newDiv.style.height = height
        newDiv.style.position = positionType
        newDiv.style.left = left
        newDiv.style.top = top
        newDiv.style.backgroundImage = url

        return newDiv

    }

    this.createBlock = function() {
        var upDiv1 = this.createDiv('url(img/up_mod.png)','200px')
        var upDiv2 = this.createDiv('url(img/up_pipe.png)','60px')
        this.upDivWrap = this.createDiv(null, null, 'absolute', '450px')
        this.upDivWrap.appendChild(upDiv1)
        this.upDivWrap.appendChild(upDiv2)

        jsWrapBg.appendChild(this.upDivWrap)

    }
}